Dog class for the Python beginners' course

dog.py

import sys

class Dog():
  
  def __init__(self, name, barks=True, bites=True):
    self.name = name
    self.barks = barks
    self.bites = bites
    
  def bite(self, victim):
    if self.bites:
      print(f"The dog \"{self.name}\" bites {victim}, and {victim} goes to Pasteur to get a rabies vaccination.")
    else:
      sys.stderr.write(f"Error: dog \"{self.name}\" does not bite!")
      
  def bark(self):
    if self.barks:
      print(f"{self.name} says 'Wof, wof!'")
    else:
      sys.stderr.write(f"Error: dog {self.name} does not know how to bark!")